Fox,+Phillip

​ __Fluorine__ __ **Properties** __
 * Atomic number- 9
 * Atomic mass- 18.998404 amu
 * Gas
 * Non-metal

__**History**__ The mineral [|fluorspar] ( also called fluorite), consisting mainly of [|calcium fluoride], was described in 1530 by [|Georgius Agricola] for its use as a [|flux]. Fluxes are used to promote the fusion of [|metals] or [|minerals]. The etymology of the element's name reflects its history: Fluorine is pronounced [|/ˈflʊəriːn/],  /ˈflʊərɨn/  , or commonly  /ˈflɔr-/  ; from [|Latin]: //fluere//, meaning "to flow". In 1670 [|Schwanhard] found that glass was etched when it was exposed to [|fluorspar] that had been treated with [|acid]. [|Carl Wilhelm Scheele] and many later researchers, including [|Humphry Davy], [|Caroline Menard], [|Gay-Lussac], [|Antoine Lavoisier], and [|Louis Thenard] all would experiment with hydrofluoric acid, easily obtained by treating fluorite with concentrated sulfuric acid. Owing to its extreme reactivity, elemental fluorine was not isolated until many years after the characterization of fluorite. Progress in isolating elemental fluorine was slowed because it could only be prepared electrolytically and even then under stringent conditions since the gas attacks many materials. In 1886, the isolation of elemental fluorine was reported by [|Henri Moissan] after almost 74 years of effort by other chemists. The generation of elemental fluorine from hydrofluoric acid is exceptionally dangerous, killing or blinding several scientists who attempted early experiments on this halogen. These individuals came to be referred to as "fluorine martyrs". For Moissan, it earned him the 1906 Nobel Prize in chemistry. ​ __ **Uses ** __


 * fluorine and its compounds are used in producing isotopically fractionated uranium (from UF6)
 * commercial fluorochemicals, including many well known high-temperature plastics
 * hydrofluoric acid is extensively used for etching the glass of light bulbs, etc.
 * fluorochloro hydrocarbons are used extensively in air conditioning and refrigeration
 * in small amounts, fluorides in water sources prevent tooth decay. A constituent of toothpaste for the same reason. Soluble fluoride in drinking water (2 ppm) may cause mottled enamel in teeth of children acquiring permanent teeth.

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